Potassium Carbonate → HCID 10308060, compound

HRID 2099501Notes

Reaction equation

HRID 2099501 reaction equation
Br[C:2]1[CH:3]=[N:4][N:5]([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][N:8]=2)[CH:6]=1.[C:13]([C:15]1[CH:16]=[C:17](B(O)O)[CH:18]=[CH:19][CH:20]=1)#[N:14].C(=O)([O-])[O-].[K+].[K+]>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:8]1[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=1[N:5]1[CH:6]=[C:2]([C:19]2[CH:20]=[C:15]([CH:16]=[CH:17][CH:18]=2)[C:13]#[N:14])[CH:3]=[N:4]1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 27343253-Cyanophenylboronic acidHCID 113451062-(4-bromo-1h-pyrazol-1-yl)pyridine

Product 1

HCID 10308060HCID 10308060, compound

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
70 °C

Procedure

A solution of 2-(4bromo-1H-pyrazol-1-yl)pyridine (0.446 g, 2.0 mmol), 3-cyanophenylboronic acid (0.302 g, 2.0 mmol), potassium carbonate (0.552 g, 4.0 mmol) in a mixture of ethylene glycol dimethyl ether (20 mL) and water (4 mL) was degassed by argon bubbling for 15 min., then tetrakis(triphenylphosphine)palladium(0) (20 mg, 0.017 mmol) was added and degassing continued a further 15 min. The resulting solution was stirred at 70° C. for 14 h, whereupon H2O (30 mL) was added, then extracted with EtOAc (3×30 mL) and the combined extracts washed with brine. The organic phase was dried over Na2SO4 and concentrated in vacuo. The crude residue was chromatographed on silica gel eluting with EtOAc:hexane (2:3) to afford a white solid which was recrystallized from EtOAc/Hexane give 3-(1-pyridin-2-yl-1H-pyrazol-4-yl)benzonitrile as a white solid. MP=160-161° C. 1H NMR (CD3Cl, 300 MHz) δ 8.88 (s, 1H), 8.45 (d, 1H), 8.03 (s, 1H), 8.01 (d, 1H), 7.87 (d, 1H), 7.86 (s, 1H), 7.81 (d, 1H), 7.57˜7.48 (m, 2H), 7.25 (dd, 1H). MS (ESI) 247.1 (M++H).

Workup

  1. customwas degassed by argon bubbling for 15 min.
  2. customdegassing
  3. additionwas added
  4. extractionextracted with EtOAc (3×30 mL)
  5. washthe combined extracts washed with brine
  6. dry with materialThe organic phase was dried over Na2SO4
  7. concentrationconcentrated in vacuo
  8. customThe crude residue was chromatographed on silica gel eluting with EtOAc:hexane (2:3)
  9. customto afford a white solid which
  10. customwas recrystallized from EtOAc/Hexane

Sources & evidence

ORD record
ord-02d28ef7874b4f34ade698dd79add9bd
Source dataset
uspto-grants-2009_08
Patent number
US07569592B2

Reaction notes

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